<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">
        首页
      </el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item :to="{ path: '/roles' }">角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图-->
    <el-card>
      <!--添加角色按钮区域-->
      <el-row>
        <el-button type="primary" @click="AddRoleDialogVisible=true">添加角色</el-button>
      </el-row>
      <!--角色列表区域-->
      <el-table :data="rolesList" border stripe v-loading="loading">
        <!--展开列-->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom',i1 === 0 ? 'bdtop' : '','vcenter']" v-for="(item1,i1) in scope.row.children"
                    :key="item1.id">
              <!--渲染一级权限-->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!--渲染二级权限和三级权限-->
              <el-col :span="19">
                <!--通过 for 循环 嵌套渲染二级权限-->
                <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in  item1.children"
                        :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" closable @close="removeRightById(scope.row,item3.id)"
                            v-for="(item3) in item2.children" :key="item3.id">{{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!--索引列-->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除</el-button>
            <el-button type="warning" size="mini" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限
            </el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!--分配权限的对话框-->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%" @close="setRightDialogClosed"
      :close-on-click-modal="false" center>
      <div style="height:500px;">
        <!--树形控件-->
        <el-scrollbar style="height:100%">
          <el-tree ref="treeRef" :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all
                   :default-checked-keys="defKeys"></el-tree>
        </el-scrollbar>
      </div>
      <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRight">确 定</el-button>
  </span>
    </el-dialog>

    <!-- 添加角色对话框 -->
    <el-dialog title="添加角色" :visible.sync="AddRoleDialogVisible" width="40%" @close="addRoleDialogClosed" :close-on-click-modal="false">
      <el-form
        :model="addRoleForm"
        ref="addRoleFormRef"
        :rules="addRoleFormRules"
        label-width="100px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="AddRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑角色对话框 -->
    <el-dialog title="编辑角色" :visible.sync="editRoleDialogVisible" width="40%" @close="editRolesDialogClosed" :close-on-click-modal="false">
      <el-form
        :model="editRoleForm"
        ref="editRoleFormRef"
        :rules="editRoleFormRules"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoles">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    name: 'Roles',
    data() {
      return {
        // 所有角色列表数据
        rolesList: [],
        // 控制分配权限对话框的显示与隐藏
        setRightDialogVisible: false,
        // 添加角色表单
        addRoleForm: {},
        addRoleFormRules: {
          roleName: [
            { required: true, message: '请输入角色名称', trigger: 'blur' }
          ],
          roleDesc: [
            { required: true, message: '请输入角色描述', trigger: 'blur' }
          ]
        },
        // 所有权限的数据
        rightsList: [],
        // 树形控件的绑定对象
        treeProps: {
          label: 'authName',
          children: 'children'
        },
        // 默认选中的节点Id数组值
        defKeys: [],
        //   添加用户对话框
        AddRoleDialogVisible: false,
        //   编辑角色信息
        editRoleForm: {},
        editRoleDialogVisible: false,
        editRoleFormRules: {
          roleName: [
            { required: true, message: '请输入角色名称', trigger: 'blur' }
          ],
          roleDesc: [
            { required: true, message: '请输入角色描述', trigger: 'blur' }
          ]
        },
        //   当前即将分配权限的Id
        roleId: '',
        loading: true
      }
    },
    created() {
      this.getRolesList()
    },
    methods: {
      // 获取所有角色的列表
      async getRolesList() {
        const { data: res } = await this.$http.get('roles')
        if (res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败')
        }
        this.rolesList = res.data
        this.loading = false
      },
      // 根据id删除对应的权限
      async removeRightById(role, rightId) {
        const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        if (confirmResult !== 'confirm') {
          return this.$message.info('取消了删除!')
        }
        const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败!')
        }
        role.children = res.data
        return this.$message.success('删除成功!')
      },
      // 展示分配权限的对话框
      async showSetRightDialog(role) {
        this.roleId = role.id
        // 获取所有权限的数据
        const { data: res } = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) {
          return this.$message.error('获取权限数据失败!')
        }
        this.rightsList = res.data
        // 递归获取三级节点的Id
        this.getLeafKeys(role, this.defKeys)
        this.setRightDialogVisible = true
      },
      // 通过递归的形式，获取角色下所有三级权限，并保存到defKeys 数组中
      getLeafKeys(node, arr) {
        // 如果当前 node 节点不包含children属性，则是三级节点
        if (!node.children) {
          return arr.push(node.id)
        }
        node.children.forEach(item => this.getLeafKeys(item, arr))
      },
      // 监听分配权限对话框的关闭事件
      setRightDialogClosed() {
        this.defKeys = []
      },
      // 点击为角色分配权限
      async allotRight() {
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        const idStr = keys.join(',')
        const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
        if (res.meta.status !== 200) {
          return this.$message.error(res.meta.msg)
        }
        this.$message.success(res.meta.msg)
        this.getRolesList()
        this.setRightDialogVisible = false
      },
      // 添加角色
      addRoles () {
        this.$refs.addRoleFormRef.validate(async valid => {
          if (!valid) return
          const { data: res } = await this.$http.post('roles', this.addRoleForm)
          if (res.meta.status !== 201) {
            this.$message.error('添加角色失败！')
          }
          this.$message.success('添加角色成功！')
          this.AddRoleDialogVisible = false
          this.getRolesList()
        })
      },
      // 添加角色对话框的关闭
      addRoleDialogClosed () {
        this.$refs.addRoleFormRef.resetFields()
      },
      // 删除角色
      async removeRoleById (id) {
        const confirmResult = await this.$confirm(
          '此操作将永久删除该角色, 是否继续?',
          '提示',
          {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }
        ).catch(err => err)
        if (confirmResult !== 'confirm') {
          return this.$message.info('已取消删除')
        }
        const { data: res } = await this.$http.delete('roles/' + id)
        if (res.meta.status !== 200) return this.$message.error('删除角色失败！')
        this.$message.success('删除用户成功！')
        this.getRolesList()
      },
      // 编辑角色
      async showEditDialog (id) {
        const { data: res } = await this.$http.get('roles/' + id)
        if (res.meta.status !== 200) return this.$message.error('查询角色信息失败！')
        this.editRoleForm = res.data
        this.editRoleDialogVisible = true
      },
      // 编辑角色对话框关闭
      editRolesDialogClosed () {
        this.$refs.editRoleFormRef.resetFields()
      },
      editRoles () {
        this.$refs.editRoleFormRef.validate(async valid => {
          // console.log(valid)
          // 表单预校验失败
          if (!valid) return
          const { data: res } = await this.$http.put(
            'roles/' + this.editRoleForm.roleId,
            {
              roleName: this.editRoleForm.roleName,
              roleDesc: this.editRoleForm.roleDesc
            }
          )
          if (res.meta.status !== 200) {
            this.$message.error('更新角色信息失败！')
          }
          // 隐藏编辑角色对话框
          this.editRoleDialogVisible = false
          this.$message.success('更新角色信息成功！')
          this.getRolesList()
        })
      }
    }
  }
</script>

<style lang="less" scoped>
  .el-tag {
    margin: 7px;
  }

  .bdtop {
    border-top: 1px solid #eee;
  }

  .bdbottom {
    border-bottom: 1px solid #eee;
  }

  .vcenter {
    display: flex;
    align-items: center;
  }
</style>
